13 fat boy lo no start.

1544 Views 23 Replies 6 Participants Last post by SCHMIDTY, 9 d ago

09Blackiron

Discussion Starter · 13 d ago

She's a fixer upper and had no power to the fuel pump, I removed the tank cleaned it and replaced everything inside with brand new. thinking the issue was the pump due to sitting with crap gas for 5yrs. Still no go. fuses are good .
I get ecm, bcm and speedo codes . and PN. My question is Do the PN need to be addressed or replaced?
The code list is to long to enter right now . lots of comms loss codes. crankshaft position sensor on and on and on.
Thanks In advance to all who have any knowledge of which it appears I lack🤣🤣
Reg

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1/2 Ton

· #2 · 13 d ago

NO! The p/n is the part number for your ECM. It will flash the p/n even when no codes are present.
At least you know that parts ok....

There is a full listing of the trouble codes in the FSM. (FSM is Harley Davidson Service Manual) Not a clymer nor a Haynes. This book will pay for itself the first time you use it!
About $150 (new) from the parts department at your local dealer. They are year and model specific. They take a while to print sometimes. It all depends on how many of which books are on order. They can be found used online (ebay and similar) Just make sure you order the specific book for your bike. Make and YEAR.

The set is 3 books: Service manual, Electrical Diagnostic Manual and Year Parts catalog.

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1/2 Ton

· #3 · 13 d ago

Deleted, double post... Sorry!

09Blackiron

Discussion Starter · #4 · 13 d ago

Hi 1/2 Ton, I did read that the BCM controls power to a multitude of systems including the fuel pump. and the BCM codes are all comm loss related. Could this be a BCM failure The bike did sit in unfavorable conditions for a long time

1/2 Ton

· #5 · 13 d ago

09Blackiron said:
Hi 1/2 Ton, I did read that the BCM controls power to a multitude of systems including the fuel pump. and the BCM codes are all comm loss related. Could this be a BCM failure The bike did sit in unfavorable conditions for a long time

Honestly, I am not the go to guy for electronics.
The codes all being comm related (could be) from a dead battery over a long period.

I don't want to throw bad info to you. So hold off, to see if one of the techs chime in on this thread...
I'm thinking that soft codes are similar to historical codes they can be erased, then run the scan again. If the same codes pop back up, then they are hard codes (active codes). The soft codes can be dismissed.

And yes the BCM controls everything!
I do know the most important factor in electrical troubleshooting on a HD is: Battery condition and good connections. Many people overlook the ground wires. All grounds must be clean bare metal and tight. The battery must be fully charged and pass a load test. (even new batteries with good voltage are known to fail the load test)... I have personally had a brand new battery fail load test.

On a bike that has been subject to weather, er moisture, of whatever source; I would pull and clean then put some dielectric grease on every connection that i can find. Bad connections are pure hell to troubleshoot...

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09Blackiron

Discussion Starter · #6 · 13 d ago

Battery is brand new also and connections are snug. Good idea with the connections and the grease. I guess that's next thing to tackle.
Thx Reg

wonkey

· #7 · 13 d ago

Reset the codes and see what comes back, a bad battery or disconnected battery can cause those errors. Like mentioned above, get a harley service manual and electrical diagnostic manual at a minimum.

Reactions: 1

09Blackiron

Discussion Starter · #8 · 13 d ago

Hey Wonky, If the bike won't start will the codes come back? I got a lot of learning to do lol

wonkey

· #9 · 13 d ago

Yes, when it runs thru all the checks it will display codes if there is something wrong

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09Blackiron

Discussion Starter · #10 · 13 d ago

Awesome Thanks

1/2 Ton

· #11 · 13 d ago

09Blackiron said:
Battery is brand new also and connections are snug. Good idea with the connections and the grease. I guess that's next thing to tackle.
Thx Reg

I figured you know how to install the battery and tighten the post connections... The entire point of my prior post is the other end of those connections and the wire harness itself. They the ones that get overlooked.

Reactions: 1

09Blackiron

Discussion Starter · #12 · 13 d ago

Haha , It's good you made mention of it though , I do have my sub genius moments and a loose terminal is easy to miss.

Reactions: 1

tekslk

· #13 · 13 d ago

We had a similiar issue this weekend we cleared the codes and it started and ran perfect. We had a very low battery.

Reactions: 1

SCHMIDTY

· #14 · 13 d ago

09Blackiron said:
She's a fixer upper and had no power to the fuel pump, I removed the tank cleaned it and replaced everything inside with brand new. thinking the issue was the pump due to sitting with crap gas for 5yrs. Still no go. fuses are good .
I get ecm, bcm and speedo codes . and PN. My question is Do the PN need to be addressed or replaced?
The code list is to long to enter right now . lots of comms loss codes. crankshaft position sensor on and on and on.
Thanks In advance to all who have any knowledge of which it appears I lack🤣🤣
Reg

Does your bike have the security system with a FOB ?

09Blackiron

Discussion Starter · #15 · 13 d ago

Hey Shmidty, yes it does have the fob system.

SCHMIDTY

· #16 · 13 d ago

09Blackiron said:
Hey Shmidty, yes it does have the fob system.

Are the directional lights flash when you turn the ignition on ? If yes then the bike is in security mode.

Reactions: 1

SCHMIDTY

· #17 · 13 d ago

Another thing, check or replace the FOB battery.

09Blackiron

Discussion Starter · #18 · 13 d ago

I did replace the fob batteries with new ones . to be honest I'm not sure if the lights flash or not. Something to look for when I get out there.

09Blackiron

Discussion Starter · #19 · 12 d ago

Morning, So I cleared all the codes and all i get now is one bcm code b2116, fuel pump output open. I guess that's a good thing considering the shopping list of codes i originally had.

SCHMIDTY

· #20 · 12 d ago

09Blackiron said:
Morning, So I cleared all the codes and all i get now is one bcm code b2116, fuel pump output open. I guess that's a good thing considering the shopping list of codes i originally had.

Do the directionals flash when you turn the ignition on ? The security system disables the fuel pump.

Reactions: 2

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